Manhole



oct. 12 192e. 1,602,713

F. E5PidQlEHI MANHOLE Filed Oct. 28. 1924 INVENTEJR' f 5f? fl 'ranch an I ATTY Patented Oct. 12, 1926.

UNITED STATES FRANCIS SHANLEY, O F CHICAGO, ILLINOIS.

MANI-IDLE.

Application filed October 28, 1924. Serial Nol 746,315.

This invention relates to manholes for catch basins, public utility street vaults, battery wells for railway signal systems, etc. The object of the invention is to improve upon the construction shown in my prior latent No. 1,384,712, issued July 12, 1921,

by reducing the number of parts and by strengthening the base ring.

In the accompanying drawings, Figure 1 is a vertical central sectional view of a manhole embodying the features of my invention. Fig. 2 is a detail plan view of one of the parts.

The drawing shows a portion of a catch basin vault or similar structure A which may be built of any suitable material and of any preferred form. Surrounding the opening in the upper end of the catch basin or vault and resting upon the masonwork of which the vault is formed is an annular horizontally disposed base ring 1, preferably of cast iron. Integral with the base ring 1 is an annular relatively short upwardly extending flange 2 of larger diameter than the inner periphery of the ring 1, thus providing an annular horizontal ledge 3 to sup-- port a curb 4. If desired, ay suitable number of ribs 5 may be provided to extend from the flange 2 to the outer edge of the ring 1 to o strengthen said ring.

The curb 4 has a cylindrical vertical outer wall, and has upon its inner surface two opposed annular ledges or shoulders 6. The ledges 6 are similar in form and interchangeably adapted to support a cover 7 of any suitable character. The ledges 6 are located at equal distances from a horizontal plane passing midway between the upper and lower edges of the curb.

As shown in Fig. 1, the concrete sub-base 8 of the pavement may and preferably does overlie the outer portion of the base ring 1 and extend to the flange 2. The paving blocks 9 overlie the base ring 1 and the flange 2 and are fitted around the curb 4.

When the upper ledge 6 has worn to such an extent as not to support the cover 7 properly, the curb 4 may be easily lifted out, inverted and replaced, thereby bringing the other ledge 6 into position to support the cover. The curb 4 is not held down by overlying paving material. Ordinarily the curb may be readily lifted out of place, but if the curb should adhere by reason of asphalt orthe like having been poured into crevices between the curb and to the paving blocks,

the blocks, the curb may be readily loosened by driving a chisel down alongside it. The ledge 3 projects inwardly beyond the inner periphery of the curb 4 so that a crowbar may bear against said ledge in the operation of removing the curb. A

It will be apparent that the construction herein shown permits of renewing the coversupporting ledges or flanges with practically no disturbance of the pavement and with a minimum amount of manual labor. There are but two parts to handle, namely, the base ring 1 and the curb 4, and the design of these parts is such that their weight has been reduced to the point where they can be handled by one workman.

I claim as my invention:

1. A manhole for catch basins and the like having, in combination, a base ring having an upwardly extending flange integral therewith, and an annular horizontal ledge extending inwardly from said flange; an annular reversible curb adapted to restv upon said ledge and fit within said flange, said curb having upon its inner surface two annular cover-supporting ledges equidistantly spaced from the horizontal median plane of the curb, and a cover adapted to rest on either of the last mentioned ledges.

2. A manhole for catch basins andthe like having, in combination, a base ring having an upwardly extending flange integral therewith, and an annular horizontal ledge extending inwardly from said flange; an annular reversible curb adapted to rest upon said ledge and fit within said flange, said curb having two opposed surfaces adapted to rest upon the ledge and two other opposed surfaces each adapted to support a cover; and a cover supported by the curb.

3. A manhole for catch basins and the like having, in combination, a .base ring having an upwardly extending flange integral therewith, and an annular horizontal ledge extending inwardly from sai-d flange; an annular reversible curb adapted to rest upon said ledge and fit within said flange, said ledge extending' inwardly beyond said curb to provide support for a crowbar, curb being adapted in either of its positions: to support a cover; and a cover supported byV the curb.

4. rlhe combination of a horizontally dis'- posed base ring having integral therewith an annular relatively short upwardly extending flange of larger diameter than the inner periphery of Jshe ring, thus providing Within said flange an `annular horizontal ledge, a reversible curb having a Cylindrical Verfioul outer Wall, either the upper or the lower edge of said Curl) being adapted to rest upon Said ledge, said curb having upon its inner periphery two opposed annular ledges either or' which is adapted to support a cover, a cover resting upon the uppermost leal-.Ue of the curb, and paving material overlying the hase ring and the flange, the upper surface of the paving material being; substantially flush with the upper edge of the eurb.

n testimony whereof, I have hereunto affixed lny signature.

FRANCIS SHANLEY. 

